More than six million bats are dead, and millions more are expected to fall victim to a disease known as White-nose Syndrome, or WNS. First identified in the northeastern United States, WNS has wiped out an estimated 95% of Pennsylvania’s bat population and is quickly spreading across the country. It was most recently discovered in Missouri, Delaware and Alabama.

“This is like bringing small pox to the New World. It is surely an unprecedented wildlife disaster for North America,” said Bucknell University professor Dr. DeeAnn Reeder. Reeder is one of the country’s leading experts on WNS, and one of the researchers responsible for identifying the cause of the disease in 2011. “We can’t stop this thing. It’s marching across the country and we’re going to see some extinction.”

Reeder has been studying the disease since shortly after it was discovered in a New York cave in 2006. Since then it was been detected in at least 17 other states. Few bats exposed to the fungus that causes WNS survive.